Process for manufacturing glue.



RICHARD BERLINEB, OF MOSCOW, RUSSIA.

rnocnss FOB muracrunmc GLUE.

No Drawing.

To all whom it may concern:

Be it known that I, RICHARD Bnnnnmn,

a citizen of the German Empire, residing at r light-colored glue frombones, whether the fat has been previously extracted or not, by treatingthe bones with gaseous sulfurous acid, then washing the acid-treatedbones to wash out the substances dissolved by the acid and to remove theacid from the bones, and then boiling out the glue from bones thustreated. In case fat-containing bones are used as the raw material forthis prior process, the bone-grease or fat is then separated after theglue-boiling operation.

I have discovered that a more intensive bleaching of fat-containingbones with gaseous sulfurous acid can be eifected, if the washin of theacid-treated bones is omitted an the ste s of fatand glue extraction arereverse viz., the extraction of fat is eifected immediately after theacid treatment and the glue thereafter extracted.

This process is based on the discovery that the sulfurous acid can beexpelled without washing if the fat extraction takes place immediatelyafter the acid treatment and is not postponed to the extraction of theglue.

By my process, not only is the washing step omitted as the superfluousacid is entirely removed by the fat extraction, but the bleaching eflectis increased as the acid con-. tained in the dissolved fat performs anadditional bleaehin action during its escape from the ores o the bonesso that the entire material is bleached throughout.

During the removal of the acidified fat from the bones in a liquidstate, the acid moisture of the raw material is evaporated and thesulfurous acidcomes into" much.

closer contact with the walls of the pores than when gaseous acid onlyis used. The bleaching effect of the sulfurous acid is thereforeincreased by the fat extracting process andis perceivable not only onthe outside of the raw material, but throughout the inner portions ofthe bones. The intensive action of Specification of Letters l'atent.

Patented Mar. 21, 1916.

\ Application flied Kay 26, 1914. Serial No. 841,148.

the acidified fat is apparent from the fact that the sinews and cartilae assume an amber-like appearance and 0 not shrink during thefat-extracting process.

The quantity of sulfurous acid used in my process must be soproportioned that the structure of the bones is not afiected. It isfurther important that bones from which the fat has not been extractedshould be used as the starting material since bones, if free from fat,will not be affected by the bleaching action exerted upon the walls ofthe pores of the bones by the acid contained in the bone-grease duringthe expulsion of the fat.

An example of the mannerin which my process is carriedout, is as followsThe crude bones to be treated are ut into a suitable vessel and gaseoussul rous acid is passed through the bones within the receptacle. Thisgas treatment is continued for about six hours for each 8000 kg. ofbones; and the quantity of used is that produced by burning one-ha f kg.of sulfur for each 100kg. of bones. The acid treatment being finished,the bones now containing acid vapors within their pores, are treatedwith va ors of a fat-dissolving mediu'm, such as nzin. The benzin vaporsdissolve the fat within the pores of the bones, the resulting solutionflowing from the bones, collecting at the bottom of the receptacle. themthe acid contained within the pores of the bones and may be condensed toliquid form and used again and again for the fatextracting bonetreatment. After the fat extraction is finished, the bones are broughtinto a polishing drum in order to completely clean them from adheringimpurities. This treatment is readily eflected in a short time becauseof the eifective action of the sulfurous acid. The bones are then brokenup, in a disintegrating machine, into small lumps about the size of ahazel nut. After this treatment the granulated bones are introduced intoan autoclave where they are treated alternatingly with steam underpressure of, say, one atmosphere and with hot water. In this way theglue contained in the bones is formed-under steam pressure and extractedby the hot water. This wellknown process of alternating treatment The.benzin vapors take withwith steam and water is repeated for, say, thesulfurous acid and therefore boiling out 12 to 15 times, until the wholeof the glue the glue from the said fat-extracted bones. 10

contents is extracted. In testimony whereof I aifix my signa- What. Iclaim is: ture in presence of two witnesses. 5 A process for producingglue-which con- RICHARD BERLINER.

sists in treating fatty bones with gaseous Witnesses: sulfurous acid,extracting the fat from the CHR. EBFURT, bones thus acidified andthereby expelling LYDIA RfiLL.

copies 0! this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

with steam and water is repeated for, say, the sulfurous acid andtherefore boiling out 12 to 15 times, until the whole of the glue theglue from the said fat-extracted bones. 10 contents is extracted. Intestimony whereof I afiix my signa- What I claim is: 1 ture inpreseneeof two witnesses. A process for producing glue which con-RICHARD BERLINER. sists in treating fatty bones with gaseous Witnesses:

sulr'urous acid, extracting the fat from the Gun. ERFUR'r, bones thusacidified and thereby expelling LYDIA Bonn.

Correction in Letters Patent 'No. 1,176,644.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner or Patents,

Washington, I). G.

It is hereby certified that Letters Patent No. 1,17 6,644, granted March21, 1916, upon the application of Richard Berliner, of Moscow, Russia,for an improvement in Processes for Manufacturing Glue, an error appearsin the printed specification requiring correction as follows: Page 2,line 9, claim, for the word therefor-e" read 7 thereupon; and that thesaid Letters Patent should be read with this correction therein thatthesame may conform to the record of the case in the Patent Office. iSigned and sealed this 19th da of June, A. 1)., .1917.

[SEAL.] F. w. H. CLAY,

Acting Commissioner of Patents.

It is hereby certified that in Letters Patent No. 1,176,644, grantedMarch 21, 1916,

upon the application of Richard Berliner, of Moscow, Russia, for animprovement in Processes for Manufacturing Glue," an error appears inthe printed specification requiring correction as follows: Page 2, line9, claim, for the word therefore read thereupon; and that the saidLetters Patent should be read with this correction therein that the samemay conform to the record of the case in the Patent Ollice.

Signed and sealed this 19th day of June, A. D., 1917.

F. W. H. CLAY, Acting Commissioner of Patents.

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